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kobo eReader Device Adaptation
SDcard Partitions
[vgrade@quad original-sdcard-image]$ sudo fdisk -l /dev/sde
Disk /dev/sde: 1977 MB, 1977614336 bytes 4 heads, 16 sectors/track, 60352 cylinders, total 3862528 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
/dev/sde1 19456 543744 262144+ 83 Linux /dev/sde2 543745 1068033 262144+ 83 Linux /dev/sde3 1068034 3862527 1397247 b W95 FAT32
sde1 - rootfs sde2 - recovery rootfs sde3 - partion for storing books
two sdcard slots - mmcblk0 = internal slot, mmcblk1 = external slot
Backup sdcard
sudo dd if=/dev/sde of=kobo-touch-sde.raw bs=1M
In /usr/local/Kobo/udev/sd following code checks for hardware version
if [ `dd if=/dev/mmcblk0 bs=512 skip=1024 count=1 | grep -c "HW CONFIG"` == 1 ]; then
if [ -e /drivers/ntx508 ]; then PLATFORM=ntx508
So I have ntx508 platform device. Well I thought I did. Looking at the chip its imx507
Create a bootable sdcard
Now try to see if we can create sdcard to boot existing firmware from external slot. Needs uboot config + filesystem changes mmcblk0/1 + kernel command line
rootfs/etc/u-boot/ntx508 has u-boot.mmc and u-boot.recovey files
So process is as follows
dd if=u-boot.bin of=/dev/$DEVICE bs=1K seek=1 skip=1 dd if=waveform.header of=$DEVICE bs=512 seek=14335 dd if=waveform of=/dev/$DEVICE bs=512 seek=14336 dd if=uImage of=/dev/$DEVICE bs=512 seek=2048
make a basic mer image with mer-core-armv7l-xorg-basic-qmlviewer.ks
mic cr fs mer-core-armv7l-xorg-basic-qmlviewer.ks ...
copied fs image onto sdcard p1 after increasing its size
sudo tar --numeric-owner -xf kobo.tar.b2.tar -C /run/media/vgrade/rootfs
boots this filesystem but got errors
Failed to mount /dev:No such device Failed to open /dev/kmsg for logging: No such file or directoy
Typical systemd errors. So we need a new kernel. Get kernel from git Get kernel config from running device /proc/config.gz
Test build kernel with options from device flash to sdcard test
make ARCH=arm CROSS_COMPILE=~/CodeSourcery/Sourcery_G++_Lite/bin/arm-none-linux-gnueabi- uImage dd if=uImage of=/dev/$DEVICE bs=512 seek=2048
boots ok, but extra "epdc_init_sequence(994) : epd_power_on request fail !" message
Edit .config for mer systemd options Build kernel with options from device + Mer options flash to sdcard test - boots kernel then nothing on serial or screen- Check logs on sdcard.
xorg log looks good. need to enable a terminal session on serial so I can log in
ln -s lib/systemd/system/getty@.service lib/systemd/system/getty.target.wants/getty@ttymxc0.service
good we have a terminal
but the error we had with this kernel source "epd_power_on request fail !" is saying that the eink display has no power.
Using the right kernel (imx507) source managed to get qmlviewer up
Qt5
Kickstart file here File:Nogl-armv7l.ks
sudo mic create fs nogl-arm7l-vm.ks --arch=armv7l --pack-to=nogl.tar.bz2
export XDG_RUNTIME_DIR=/tmp
Usefull Links
http://bricoles.du-libre.org/doku.php/kobo:la_page_kobo https://twitter.com/magoroku15/status/232885549436923905 http://a3nm.net/blog/fnacbook_kobo_more_hacking.html http://petit-noise.net/blog/20120802/kobo-touch%E3%81%ABusb%E3%82%B7%E3%83%AA%E3%82%A2%E3%83%AB%E3%82%92%E7%B9%8B%E3%81%92%E3%82%8B https://wiki.merproject.org/wiki/Adaptation_Guide/Step_by_step#Make_an_image
